Ah, found the problem...

It looks like "armv7l" didn't exist when this version of Spidermoney
was released.  Just expand a previous patch to include all arm*
architectures.

3rdp/build/GNUmakefile

@@ -36,9 +36,6 @@ ifneq ($(os),darwin)
  endif
 endif
 # Blacklist some machines...
-ifeq ($(machine_uname),armv7l)
- JS_CONFIGURE_ARGS += '--disable-tracejit'
-endif
 
 JS_CONFIGURE_ENV += 'CXXFLAGS=$(CXXFLAGS)'
 

3rdp/build/js-makefile.patch

@@ -5,7 +5,7 @@
  #############################################
  
 -ifeq (,$(filter-out powerpc sparc,$(TARGET_CPU)))
-+ifeq (,$(filter arm %86 x86_64,$(TARGET_CPU)))
++ifeq (,$(filter arm% %86 x86_64,$(TARGET_CPU)))
  
  VPATH +=	$(srcdir)/assembler \
  		$(srcdir)/assembler/wtf \